It could be pain related to an anal fissure or could be due to hemorrhoids ...
I agree with your measures ...PREP H is fine ( Vaseline similar idea apply to a bonus daily for 2 weeks to promote prtection and healing )
Stool softener daily may reduce friction of BM to lower rectum or anus
Regimen daily if option 1 Surfak 260mg capsule is over the counter
Option 2 generic docusate 100mg capsules >> 2 caplets daily
Option 3 -- Mineral oil 1 tablespoon daily
The soluble fiber is fine too to help keep regular BMs ( Metamucil for example helps to keep it as middle of road daily ) ok to use Stool softener plus Metamucil ...
If pain or rectal bleeding should be ongoing then I would advise that you consider be checked by a general surgeon ( that specialist actually deals most frequently with this issue )
I hope that this information is helpful for you
Let me know if you have further questions or concerns
I will be happy to get back with you
If my answer has been helpful and to your satisfaction then please remember to leave positive feedback
Thank you and Best Regards,
Anthony Bray MD